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Retirement Plans - Defined Benefit Plan, Projected Benefit Obligation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
United States [Member] | Pension Plans [Member]
Projected benefit obligation, Beginning balance	$ 972	$ 168,064
Service cost		568	$ 450
Interest cost	29	6,491	6,829
Actuarial (gains) losses	(32)	6,415
Benefits paid	0	(3,416)
Plan settlements	(969)	(177,150)
Projected benefit obligation, Ending balance		972	168,064
United States [Member] | Retiree Healthcare Plan [Member]
Projected benefit obligation, Beginning balance	17,724	17,121
Service cost	499	566	546
Employee contributions	1,214	1,159
Interest cost	777	636	618
Actuarial (gains) losses	2,081	(621)
Benefits paid	(1,109)	(1,007)
Plan amendments		(130)
Projected benefit obligation, Ending balance	21,186	17,724	17,121
Non-U.S. Pension Plans [Member] | Pension Plans [Member]
Projected benefit obligation, Beginning balance	93,722	96,378
Service cost	4,339	5,368	5,082
Employee contributions	499	622
Interest cost	1,735	1,707	1,518
Actuarial (gains) losses	13,385	(2,274)
Benefits paid	(3,281)	(3,277)
Plan amendments		(44)
Plan settlements	(7,407)	(2,791)
Other plans	1,598	1,063
Currency impact	(1,224)	(3,030)
Projected benefit obligation, Ending balance	$ 103,366	$ 93,722	$ 96,378

X

- Definition

Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

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Amount of contributions received by defined benefit plan from participant which increase benefit obligation.

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Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of increase (decrease) in benefit obligation of defined benefit plan from change, classified as other.

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Amount of (increase) decrease to benefit obligation of defined benefit plan from irrevocable action relieving primary responsibility for benefit obligation and eliminating risk for obligation and assets used to effect settlement. Includes, but is not limited to, lump-sum cash payment to participant in exchange for right to receive specified benefits, purchase of nonparticipating annuity contract and change from remeasurement.

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